Existence
noun, する verb
I exist, I suppose... this is the kind of existence I have. I'm not really sure either way, and I don't care. Existence is futile, I suppose.
そんざい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
そもそも、この町には水害防止対さくが存在していなかったんだよ。
There were no existing flood-control measures in this town to begin with.
じゃあ、最初はオゾンそうに穴は存在していなかったんですか？
So does that mean there were no holes in the ozone layer originally?
「コウイチさんが存在するとは思えない…」とフグは言った。
"I can’t believe Koichi exists..." Fugu said.